Your best bet it to flee to the nearest botanica . If you don’t know what a botanica is, Google it, get directions and head there. If it has a phone number, call and try to speak with the shop owner. The owner of a botanica is exponentially better equipped to assist you with a supernatural clown than the police. If you can make it to the botanica, that’s excellent. There will be a variety of goods and products there designed to ward off different kinds of malevolent beings. Again, speak with the proprietors about your clown problem (they’ll understand) and take whatever advice they can give you.